New research by NASA scientists reveals that while the hole in the ozone layer is stabilizing, it will take until 2070 to completely recover, the Los Angeles Times reports.
Levels of chlorine in the atmosphere have fallen due to the Montreal Protocol treaty, which was passed two decades ago in an effort to ban chlorofluorocarbons and other compounds.
But the levels have yet to drop below the threshold for it to stabilize the ozone layer.
Experts of the hole over Antarctica has grown compared to last year identified. World Meteorological Organization , holes 29 million square kilometers in 2000 reported that close to record levels . Montreal in 1987 with the agreement , which is effective in the depletion of the ozone layer of the use of certain chemical substances is banned in most countries …
Experts large part of Europe , America, Asia and Africa on the ozone layer to return to the situation prior to 1980 may take more than 40 years of reporting. Nasa experts , the hole on the Antarctic continent will remain the same until the year 2018 , starting around 2020 with the opening of improvement but could be closed in 2070 estimates.